Andijkw l ee beck



WIT/M8858 W Nov. 13 1923. 1,473,948

A. L. BECK CALCULATOR Filed sew. v. 1922 a @N. i I,

INVENTUR A-LBECM;

A TTORNE Y8 Patented Nov. 13, 1923.

PATENT OFFICE.

ANDREW LEE BECK, or ORLANDO, FLORIDA.

CALCULATOR.

Application filed September 7, 1922. Serial No. 586,750.

To all whom it may concern:

Be it known that I, ANDREW LEE BECK, a citizen of the United States, anda resident of Orlando, in the county of Orange and State of Florida,have invented certain new and useful Improvements in Calculators, ofwhich the following is a specification.

This invention relates in general to calculators, and more particularlyto an improvement in lumber calculators of the type forming thesubjectanatter of my copending application, filed Dec. 16, 1921, SerialNo. 522,815.

The object of the invention is to PIOVldG an extremely simple anddurable lumber calculator which may be readily operated and manipulatedto enable the user to ascertain the number of board feet contained inany given number of pieces of lumber of any given dimensions without thenecessity of carrying out any mathematical calculations or processes.

Other objects and advantages ,of the invention reside in certain novelfeatures of the construction, combination and arrangement of parts whichwill be hereinafter more fully described .and particularly pointed outin the appended claims, reference being had to the accompany ng drawingsforming part of this specification, and in which:

Figure 1 is a perspective view, illustrating the preferred embodiment ofthe invention;

Figure 2 is a view thereof in longitudinal vertical section; and

Figure 3 is a fragmentary view in ele vation, illustrating a portion ofthe chart.

Referring to the drawings wherein for.

the sake of illustration is shown the preferred embodiment of theinvention the numeral 10 designates side plates which with the table 11make up the frame of the calculator. The side plates 10 are providedwith hearing slots 1.2 open at their upper ends and with inclined facesor seats 13. A chart bearing cylinder or roller 14: is provided and isformed with trunnions 15 which are rotatably received in the bearingslots 12. An indexing bar 16 is supported upon the inclined faces orseats 13 and is fastened thereto. The arrangement is such that when thebar 16 is assembled with the side plates it is cooperatively disposedwith respect to the chart on the cylinder 14. Moreover it serves tomaintain the cylinder in position that .is it prevents displacement ofthe trunnion 15 of the cylinder from the groove 12. Preferably thefastening means 17 which serves to secure or fasten the index bar to theinclined faces or sides 13 comprise screws or other removable andreleasable devices, thus providing for disassembly if desired.

The chart which is wrapped around the cylinder 14 correspondssubstantially with the chart or table employed in the device forming thesubject-matter of my 00-.

pending application and includes as before groups of figures, designatedat 20, which represent the length in feet of the boards and a pluralityof sets of figures 21 arranged adjacent each group 20 and representingin inches the width and thickness in which ,the lumber of adjacentgroups comes. The body of the chart is provided with horizontal andvertical lines, as before, but in this case the lines extendcircumferentially and transversely when the chart is wrapped on thecylinder and these lines provide the spaces in which the computedfigures 22 are disposed. The index bar carries a series of numbers 24which represent the number of pieces of lumber computed. It is obviousthat when the cylinder is turned to bring the number of the group 20immediately above the index bar, the number of board feet in any givennumber of pieces of lumber may be immediately ascertained by observingthe particular computed number which is disposed immediately above andadjacent to the number of the series 23 of the index bar whichcorresponds to the number of pieces of lumber to be computed.

I claim:

1. A calculator comprising a frame, a chart bearing. cylinder rotatablymounted on the frame, a combined indexing and retaining bar secured tothe frame and cooperable with'the cylinder.

2. A calculator comprising side plates having vertical bearing slotsopen up c1 ends and also mvidcd with faces, a chart bearing cylindertrunnions rotatably received in said clots, and an index bar scatcdinclined faces of the side platcs; and. thereto, the indc; bar beingthus at the i2? inclined 1112mm g bum-mg against; the

secured c0 0 pc 1- cylnlc ier to "2111111110115 Oil? slot-s.

L and cngagcablc with the event displacement of the e c *hnder from thebcarinv' (J ANDJJ NW LEE Bi; CK.

